Merkoša sitáhtat

APA-čujuhus (7. p.)
Estados Unidos Geological Survey & Charles D. Walcott. (1897). Map showing condition and progress of topographic surveys and location of gaging stations for the fiscal year 1896-1897. U. S. Geological Survey.
Chicago-čujuhus (17. p.)
Estados Unidos Geological Survey juo Charles D. Walcott. Map Showing Condition and Progress of Topographic Surveys and Location of Gaging Stations for the Fiscal Year 1896-1897. U. S. Geological Survey, 1897.
MLA-čujuhus (9. p.)
Estados Unidos Geological Survey juo Charles D. Walcott. Map Showing Condition and Progress of Topographic Surveys and Location of Gaging Stations for the Fiscal Year 1896-1897. U. S. Geological Survey, 1897.
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